Home / 630,287.20-870,929.04-479,121.76

Finding the Fourth Proportional to 630,287.20, 870,929.04 and 479,121.76

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Solution

The fourth proportional to 630,287.20, 870,929.04 and 479,121.76 is: 662,049.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,287.20 : 870,929.04 = 479,121.76 : x
  2. Step 2: Convert to fraction form
    630,287.20/870,929.04 = 479,121.76/x
  3. Step 3: Cross multiply
    630,287.20x = 870,929.04 × 479,121.76
  4. Step 4: Simplify right side
    630,287.20x = 417,281,054,479.91
  5. Step 5: Solve for x
    x = 417,281,054,479.91/630,287.20
  6. Step 6: Final answer
    x = 662,049.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.